Hach AMTAX sc Mode D'emploi page 27

7.2.2 Error messages (continued)
Error displayed Instrument reaction
Maintenance mode,
Cuvette is too hot.
cuvette heating off!
Electrode slope Maintenance mode
Incorrect electrode
Maintenance mode
data
Filter modules are Continued
contaminated measurement
Drain is blocked. Maintenance mode
Continued
Sample 1 / Sample 2
measurement
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Cause
The cuvette/sample is
over-heated.
The error occurs if the
electrode slope is not
in the range of -50mV
to -70mV
The mV value for Zero
related to Standard 1 is
not within the allowed
range.
Allowed range for
(Uzero-UStandard1)
depending on
measurement range:
Low (0.05 to 20 mg):
5mV to 200mV
Medium (1 to 100 mg):
20mV to 265mV
High (10 to 1000 mg):
50mV to 315mV
Filter modules heavily
soiled
Drain is blocked
(lime?)
the amount of sample
is not sufficient
(channel1 / channel2)
This occurs as error if
Sample detection is set
to Error.
Troubleshooting
Solution Reset error
Check if incoming
sample is in the
specified range and
increase the cuvette
temperature setpoint
(CONFIGURE>
Reset error manually
CUVETTE TEMP.)
Use lowest possible
cuvette temperature.
Call service if error
continue
Change membrane
and electrolyte, if there
is still a problem, check
standards,
measurement range Reset error manually
and chemistry, check
flow rate. If all OK, but
error still present, fit
new electrode
Check cleaning
solution (level and
delivery) and sample
delivery, check
Standard 1 (level and if
Manual or
correct for
automatically when the
measurement range),
MEMBRANE
change membrane and
REPLACEMENT or
elektrolyte. Error may
ELCTRODE
occure when sample
REPLACEMENT
has very unusual
pocess is started
properties. In this case
the error can be
switched to "OFF" in
the configuration
menue.
Clean filter modules
Reset error manually
immediately
Check drain line. Adapt
cleaning interval to Reset error manually
water hardness.
Check sample delivery,
make sure that sample
line has no negative Automatic reset when
pressure, check enough sample is
tightness of piston available or manuell
pump, check overflow reset
and air valve, check
tightness of system.
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